<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<a href="MyServlet">11</a>
<a href="user/11">11</a>

<form action="testServlet" method="post" enctype="multipart/form-data">
    <input type="text" name="username" >
    <input type="file" name="file">
    <input type="submit">
</form>

</body>
</html>